diff --git a/demo/index.html b/demo/index.html
index c1942e74..04458522 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -265,7 +265,7 @@
 
         <!-- Polyfills -->
         <script
-            src="https://cdn.polyfill.io/v2/polyfill.min.js?features=es6,Array.prototype.includes,CustomEvent,Object.entries,Object.values,URL,Math.trunc"
+            src="https://cdn.polyfill.io/v3/polyfill.min.js?features=es6,Array.prototype.includes,CustomEvent,Object.entries,Object.values,URL,Math.trunc&flags=gated"
             crossorigin="anonymous"
         ></script>